Hair-spring protector for watches



(Model.)

I. A. GURPEN.

HAIR SPRING PROTECTOR FOR WATCHES.

No, 273,034. Patented Feb.2'7, 1883.

WITNESSES AINVENTOR W W pm 'AW BY M ATTORNEYS.

UNITED STATES PATENT OFFICE.

FERDINAND A. OURPEN, OF UPPER SANDUSKY, OHIO.

HAIR-SPRING PROTECTOR FOR WATCHES.

SPECIFICATION forming part of Letters Patent No. 273,034, dated February2'7, 1883.

Application filed July 6, 1882.

T 0 all whom it may concern Be it known that I, FERDINAND A. CUR- PEN,of Upper Sandusky, in the county of Wyandot and State of Ohio, haveinvented a new and Improved Hair Spring Protector for Watches, of whichthe following is a full, clear, and exact description.

In watches the outer curl of the hair-spring is attached to theregulator by being laid between two pins fastened to the regulator-arm,and it often occurs by a jerk or sudden movement that the second curl ofthe hair-spring is thrown between the pins, thereby shortening thehair-spring and causing the watch to run too fast, and in some casesstopping the watch.

The object of myinvention is to prevent the liability of the second curlof the spring being caught by the pins, for which purpose I provide adevice for closing the space between the pins after the spring isapplied, as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a plan view of a watch spring and regnlatorhavingmyimprovementapplied. Fig. 2 is a side view of the same, and Fig. 3 is asection showing the parts in larger size.

A is the spring, and B is the regulator-arm, provided with pins a a,between which the outer end of the spring A is received.

O is the device for preventing misplaceinent of the spring, which, asshown, consists of a tongue, I), pivoted to a stud, d, that is attachedupon the regulator-arm B in such a manner (Modch) that the tongue can beturned to cover the ends of the pins (6 after the spring is applied orturned at one side to allowinsertion of the spring. The pivot of thetongue b is formed with a right-angle extension, 6, which extends at oneside of the stud at. This extension is to facilitate the turning ofthetongue to cover and uncover the ends of the pins a. The tongue is heldin its place by friction, and it will be seen that when turned over theends ofthe pins there is no possibility of the second curl of the springbeing caught between the pins by a sudden jerk or movement.

This protecting device is adapted for being slipped readily upon theregulator-arm, and may be applied to the watch when manufactured orafterward.

The device is especially intended for application to American watches ofthe ordinary manufacture.

Having thus described niyinvention, I claim as new and desire to secureby Letters Patent- 1. The hair-spring protector consisting of thepivoted tongue I) and sustaining-stud (I, combined with theregulator-arm, substantially as shown and described.

2. The combination of the tongue Z), provided with the side extension,0, with the stud (l, and regulator-arm B, provided with pins a a,substantially as and for the purpose set forth.

FERDINAND A. UURPEN.

Witnesses:

JNo. FRY, GEo. J. STEoHER.

